Experimental investigation of micromechanical behavior of advanced materials by moire interferometry

Several typical instances show that moire interferometry is an effective experimental method for micromechanics study of advanced materials. By using moire interferometry, stress-induced martensitic transformation plastic zone in ceria-stabilized tetragonal zirconia polycrystalline ceramics (Ce-TZP) is studied. The experimental results show that the stress-induced transformation at room temperature is not uniform within the transformation zone and the phenomenon of microscopic plastic flow localization for transformation is revealed. Meanwhile, the experimental investigation of the pseudoelasticity behavior of Cu-Zn-Al polycrystalline shape memory alloy and bending behavior of carbon-fiber aluminium laminates (CALL) are reported. The experiments reveal some important features of the deformation processes of the materials. Finally, the measuring ability of moire interferometry for micromechanics study is discussed.